Auto darkening filter for a welding helmet



FIG. 1 is a front perspective view of the design for an auto darkening filter for a welding helmet;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof

FIG. 4 is a rear elevational view thereof

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The evenly spaced broken lines in the drawings illustrate portions of an auto darkening filter for a welding helmet and form no part of the claimed design. 

CLAIM The ornamental design for an auto darkening filter for a welding helmet, as shown and described. 